| Year | Value | | 2023 | 387,789 | | 2022 | 369,441 | | 2021 | 352,903 | | 2020 | 340,299 | | 2019 | 348,886 | | 2018 | 340,552 | | 2017 | 331,400 | | 2016 | 320,594 | | 2015 | 303,394 | | 2014 | 285,351 | | 2013 | 266,798 | | 2012 | 247,234 | | 2011 | 228,152 | | 2010 | 210,599 | | 2009 | 198,277 | | 2008 | 190,638 | | 2007 | 183,286 | | 2006 | 176,244 | | 2005 | 169,511 | | 2004 | 163,099 | | 2003 | 156,928 | | 2002 | 148,988 | | 2001 | 141,819 | | 2000 | 136,206 | | 1999 | 131,199 | | 1998 | 125,161 | | 1997 | 119,561 | | 1996 | 114,568 | | 1995 | 109,465 | | 1994 | 104,572 | | 1993 | 99,455 | | 1992 | 94,499 | | 1991 | 90,056 |
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